A practical joke or prank is a situation set up usually to produce what the perpetrator imagines to be a humorous outcome at the expense of the target. Practical jokes are distinct from slapstick comedy or knockabout, in which the goal is to make physical events appear miscalculated, inept, or stupid. The term practical refers to the fact that the joke consists of someone doing something (a 'practice'), rather than a verbal or written joke.Since the set-up or deception is generally eventually revealed to the victim, the butt of the joke is thereby made to feel foolish or victimized. Therefore there is an inherent strain of cruelty in most practical jokes. There is no clean-cut boundary between practical jokes and hooliganism, vandalism, or sadism.